./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:33:16,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:33:16,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:33:16,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:33:16,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:33:16,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:33:16,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:33:16,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:33:16,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:33:16,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:33:16,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:33:16,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:33:16,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:33:16,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:33:16,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:33:16,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:33:16,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:33:16,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:33:16,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:33:16,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:33:16,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:33:16,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:33:16,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:33:16,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:33:16,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:33:16,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:33:16,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:33:16,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:33:16,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:33:16,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:33:16,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:33:16,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:33:16,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:33:16,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:33:16,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:33:16,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:33:16,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:33:16,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:33:16,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:33:16,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:33:16,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:33:16,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:33:16,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:33:16,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:33:16,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:33:16,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:33:16,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:33:16,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:33:16,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:33:16,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:33:16,170 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:33:16,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:33:16,170 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:33:16,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:33:16,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:33:16,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:33:16,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:33:16,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:33:16,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:33:16,172 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:33:16,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:33:16,173 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:33:16,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:33:16,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:33:16,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:33:16,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:33:16,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:33:16,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:33:16,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:33:16,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:33:16,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:33:16,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:33:16,176 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:33:16,176 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:33:16,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:33:16,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2022-11-20 10:33:16,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:33:16,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:33:16,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:33:16,533 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:33:16,533 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:33:16,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-20 10:33:19,559 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:33:19,816 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:33:19,817 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-20 10:33:19,834 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/data/41c8dbb10/10d69d21d6d84ae3aa3217773ebc02d1/FLAG6e64a29a4 [2022-11-20 10:33:19,858 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/data/41c8dbb10/10d69d21d6d84ae3aa3217773ebc02d1 [2022-11-20 10:33:19,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:33:19,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:33:19,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:33:19,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:33:19,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:33:19,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:33:19" (1/1) ... [2022-11-20 10:33:19,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1d9296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:19, skipping insertion in model container [2022-11-20 10:33:19,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:33:19" (1/1) ... [2022-11-20 10:33:19,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:33:19,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:33:20,283 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-20 10:33:20,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:33:20,304 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:33:20,363 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-20 10:33:20,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:33:20,413 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:33:20,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20 WrapperNode [2022-11-20 10:33:20,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:33:20,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:33:20,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:33:20,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:33:20,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,489 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2022-11-20 10:33:20,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:33:20,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:33:20,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:33:20,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:33:20,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,536 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:33:20,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:33:20,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:33:20,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:33:20,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (1/1) ... [2022-11-20 10:33:20,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:33:20,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:20,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:33:20,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:33:20,640 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-11-20 10:33:20,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-11-20 10:33:20,641 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-20 10:33:20,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-20 10:33:20,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:33:20,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:33:20,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:33:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:33:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:33:20,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:33:20,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:33:20,644 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:33:20,762 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:33:20,764 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:33:20,931 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:33:21,004 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:33:21,004 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:33:21,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:33:21 BoogieIcfgContainer [2022-11-20 10:33:21,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:33:21,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:33:21,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:33:21,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:33:21,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:33:19" (1/3) ... [2022-11-20 10:33:21,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450636f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:33:21, skipping insertion in model container [2022-11-20 10:33:21,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:33:20" (2/3) ... [2022-11-20 10:33:21,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450636f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:33:21, skipping insertion in model container [2022-11-20 10:33:21,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:33:21" (3/3) ... [2022-11-20 10:33:21,015 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2022-11-20 10:33:21,024 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:33:21,034 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:33:21,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:33:21,035 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:33:21,087 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:33:21,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 65 transitions, 140 flow [2022-11-20 10:33:21,183 INFO L130 PetriNetUnfolder]: 7/75 cut-off events. [2022-11-20 10:33:21,184 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:33:21,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 7/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2022-11-20 10:33:21,190 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 65 transitions, 140 flow [2022-11-20 10:33:21,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 64 transitions, 136 flow [2022-11-20 10:33:21,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:33:21,211 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f697b2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:33:21,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 10:33:21,227 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2022-11-20 10:33:21,227 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:33:21,227 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:21,228 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:21,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:33:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:21,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1602056178, now seen corresponding path program 1 times [2022-11-20 10:33:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:21,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067798220] [2022-11-20 10:33:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:21,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:21,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067798220] [2022-11-20 10:33:21,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067798220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:21,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:21,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:21,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124074013] [2022-11-20 10:33:21,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:21,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:33:21,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:33:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:21,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 65 [2022-11-20 10:33:21,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:21,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:21,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 65 [2022-11-20 10:33:21,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:22,009 INFO L130 PetriNetUnfolder]: 56/168 cut-off events. [2022-11-20 10:33:22,014 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 10:33:22,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 168 events. 56/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 468 event pairs, 12 based on Foata normal form. 94/255 useless extension candidates. Maximal degree in co-relation 263. Up to 56 conditions per place. [2022-11-20 10:33:22,019 INFO L137 encePairwiseOnDemand]: 52/65 looper letters, 21 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-11-20 10:33:22,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 184 flow [2022-11-20 10:33:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:33:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:33:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2022-11-20 10:33:22,042 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8246153846153846 [2022-11-20 10:33:22,043 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 268 transitions. [2022-11-20 10:33:22,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 268 transitions. [2022-11-20 10:33:22,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:22,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 268 transitions. [2022-11-20 10:33:22,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 53.6) internal successors, (268), 5 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,054 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,056 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 136 flow. Second operand 5 states and 268 transitions. [2022-11-20 10:33:22,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 184 flow [2022-11-20 10:33:22,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:22,062 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 141 flow [2022-11-20 10:33:22,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2022-11-20 10:33:22,068 INFO L288 CegarLoopForPetriNet]: 64 programPoint places, -7 predicate places. [2022-11-20 10:33:22,069 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 141 flow [2022-11-20 10:33:22,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:22,069 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:22,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:33:22,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 10:33:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:22,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1782947143, now seen corresponding path program 1 times [2022-11-20 10:33:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:22,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827460640] [2022-11-20 10:33:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:22,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:33:22,100 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:33:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:33:22,144 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:33:22,144 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:33:22,146 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-20 10:33:22,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-20 10:33:22,148 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-20 10:33:22,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-20 10:33:22,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:33:22,149 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 10:33:22,152 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:33:22,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 10:33:22,184 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:33:22,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 208 flow [2022-11-20 10:33:22,220 INFO L130 PetriNetUnfolder]: 10/101 cut-off events. [2022-11-20 10:33:22,220 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:33:22,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 101 events. 10/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-11-20 10:33:22,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 208 flow [2022-11-20 10:33:22,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 77 transitions, 169 flow [2022-11-20 10:33:22,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:33:22,227 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f697b2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:33:22,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 10:33:22,240 INFO L130 PetriNetUnfolder]: 3/40 cut-off events. [2022-11-20 10:33:22,240 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:33:22,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:22,241 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:22,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:33:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash 90548252, now seen corresponding path program 1 times [2022-11-20 10:33:22,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:22,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387799745] [2022-11-20 10:33:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:22,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:22,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:22,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387799745] [2022-11-20 10:33:22,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387799745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:22,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:22,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:22,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89582956] [2022-11-20 10:33:22,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:22,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:33:22,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:22,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:33:22,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:22,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 92 [2022-11-20 10:33:22,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:22,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 92 [2022-11-20 10:33:22,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:22,696 INFO L130 PetriNetUnfolder]: 740/1312 cut-off events. [2022-11-20 10:33:22,696 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2022-11-20 10:33:22,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 1312 events. 740/1312 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7286 event pairs, 122 based on Foata normal form. 768/2032 useless extension candidates. Maximal degree in co-relation 2564. Up to 667 conditions per place. [2022-11-20 10:33:22,717 INFO L137 encePairwiseOnDemand]: 75/92 looper letters, 34 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2022-11-20 10:33:22,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 271 flow [2022-11-20 10:33:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:33:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:33:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2022-11-20 10:33:22,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7391304347826086 [2022-11-20 10:33:22,723 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2022-11-20 10:33:22,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2022-11-20 10:33:22,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:22,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2022-11-20 10:33:22,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,733 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 169 flow. Second operand 5 states and 340 transitions. [2022-11-20 10:33:22,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 271 flow [2022-11-20 10:33:22,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 268 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:22,737 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 186 flow [2022-11-20 10:33:22,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2022-11-20 10:33:22,742 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -10 predicate places. [2022-11-20 10:33:22,742 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 186 flow [2022-11-20 10:33:22,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:22,743 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:22,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:33:22,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:33:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash -965967294, now seen corresponding path program 1 times [2022-11-20 10:33:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:22,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683015684] [2022-11-20 10:33:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:22,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683015684] [2022-11-20 10:33:22,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683015684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:22,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:22,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:22,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839088974] [2022-11-20 10:33:22,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:22,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:33:22,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:22,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:33:22,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:33:22,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 92 [2022-11-20 10:33:22,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:22,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 92 [2022-11-20 10:33:22,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:22,994 INFO L130 PetriNetUnfolder]: 38/250 cut-off events. [2022-11-20 10:33:22,994 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-20 10:33:22,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 250 events. 38/250 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1091 event pairs, 6 based on Foata normal form. 46/295 useless extension candidates. Maximal degree in co-relation 392. Up to 50 conditions per place. [2022-11-20 10:33:22,997 INFO L137 encePairwiseOnDemand]: 86/92 looper letters, 6 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2022-11-20 10:33:22,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 210 flow [2022-11-20 10:33:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:33:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:33:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2022-11-20 10:33:22,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7608695652173914 [2022-11-20 10:33:22,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 210 transitions. [2022-11-20 10:33:22,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 210 transitions. [2022-11-20 10:33:22,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:22,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 210 transitions. [2022-11-20 10:33:23,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,002 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 186 flow. Second operand 3 states and 210 transitions. [2022-11-20 10:33:23,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 210 flow [2022-11-20 10:33:23,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:23,007 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 180 flow [2022-11-20 10:33:23,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2022-11-20 10:33:23,009 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2022-11-20 10:33:23,009 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 180 flow [2022-11-20 10:33:23,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:23,010 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:23,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:33:23,010 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:33:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1614490504, now seen corresponding path program 1 times [2022-11-20 10:33:23,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:23,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612791208] [2022-11-20 10:33:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:23,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:23,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:23,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612791208] [2022-11-20 10:33:23,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612791208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:23,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:23,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:33:23,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504823501] [2022-11-20 10:33:23,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:23,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:33:23,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:23,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:33:23,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:23,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 92 [2022-11-20 10:33:23,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:23,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 92 [2022-11-20 10:33:23,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:23,430 INFO L130 PetriNetUnfolder]: 91/341 cut-off events. [2022-11-20 10:33:23,431 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-11-20 10:33:23,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 341 events. 91/341 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1860 event pairs, 9 based on Foata normal form. 3/337 useless extension candidates. Maximal degree in co-relation 906. Up to 145 conditions per place. [2022-11-20 10:33:23,434 INFO L137 encePairwiseOnDemand]: 83/92 looper letters, 44 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2022-11-20 10:33:23,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 410 flow [2022-11-20 10:33:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:33:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:33:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 408 transitions. [2022-11-20 10:33:23,436 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2022-11-20 10:33:23,436 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 408 transitions. [2022-11-20 10:33:23,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 408 transitions. [2022-11-20 10:33:23,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:23,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 408 transitions. [2022-11-20 10:33:23,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.285714285714285) internal successors, (408), 7 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,441 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 92.0) internal successors, (736), 8 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,441 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 180 flow. Second operand 7 states and 408 transitions. [2022-11-20 10:33:23,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 410 flow [2022-11-20 10:33:23,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:23,445 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 258 flow [2022-11-20 10:33:23,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=258, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2022-11-20 10:33:23,446 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -1 predicate places. [2022-11-20 10:33:23,446 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 258 flow [2022-11-20 10:33:23,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.166666666666664) internal successors, (319), 6 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,447 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:23,447 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:23,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:33:23,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 10:33:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:23,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1827137551, now seen corresponding path program 1 times [2022-11-20 10:33:23,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:23,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712335757] [2022-11-20 10:33:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:23,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:33:23,464 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:33:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:33:23,479 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:33:23,479 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:33:23,480 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 10:33:23,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 10:33:23,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-20 10:33:23,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 10:33:23,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 10:33:23,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:33:23,481 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 10:33:23,482 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:33:23,482 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 10:33:23,509 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:33:23,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 280 flow [2022-11-20 10:33:23,548 INFO L130 PetriNetUnfolder]: 13/127 cut-off events. [2022-11-20 10:33:23,548 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 10:33:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 127 events. 13/127 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 228 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2022-11-20 10:33:23,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 280 flow [2022-11-20 10:33:23,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 90 transitions, 204 flow [2022-11-20 10:33:23,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:33:23,553 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f697b2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:33:23,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 10:33:23,558 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2022-11-20 10:33:23,558 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:33:23,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:23,559 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:23,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 10:33:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1010684622, now seen corresponding path program 1 times [2022-11-20 10:33:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:23,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260866861] [2022-11-20 10:33:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:23,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:23,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:23,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260866861] [2022-11-20 10:33:23,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260866861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:23,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:23,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:23,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695376176] [2022-11-20 10:33:23,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:23,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:33:23,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:33:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:23,613 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 119 [2022-11-20 10:33:23,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:23,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 119 [2022-11-20 10:33:23,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:25,137 INFO L130 PetriNetUnfolder]: 6323/9886 cut-off events. [2022-11-20 10:33:25,138 INFO L131 PetriNetUnfolder]: For 2152/2152 co-relation queries the response was YES. [2022-11-20 10:33:25,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19896 conditions, 9886 events. 6323/9886 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 65986 event pairs, 1736 based on Foata normal form. 5068/14571 useless extension candidates. Maximal degree in co-relation 19863. Up to 5413 conditions per place. [2022-11-20 10:33:25,253 INFO L137 encePairwiseOnDemand]: 98/119 looper letters, 47 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2022-11-20 10:33:25,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 364 flow [2022-11-20 10:33:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:33:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:33:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2022-11-20 10:33:25,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.692436974789916 [2022-11-20 10:33:25,256 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2022-11-20 10:33:25,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2022-11-20 10:33:25,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:25,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2022-11-20 10:33:25,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,261 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 119.0) internal successors, (714), 6 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,261 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 204 flow. Second operand 5 states and 412 transitions. [2022-11-20 10:33:25,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 364 flow [2022-11-20 10:33:25,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 353 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:25,271 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 231 flow [2022-11-20 10:33:25,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2022-11-20 10:33:25,274 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, -13 predicate places. [2022-11-20 10:33:25,274 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 231 flow [2022-11-20 10:33:25,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:25,277 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:25,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:33:25,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 10:33:25,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:25,282 INFO L85 PathProgramCache]: Analyzing trace with hash -156069315, now seen corresponding path program 1 times [2022-11-20 10:33:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:25,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566447350] [2022-11-20 10:33:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:25,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:25,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:25,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566447350] [2022-11-20 10:33:25,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566447350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:25,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:25,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:25,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084323580] [2022-11-20 10:33:25,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:25,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:33:25,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:25,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:33:25,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:33:25,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 119 [2022-11-20 10:33:25,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:25,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 119 [2022-11-20 10:33:25,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:25,593 INFO L130 PetriNetUnfolder]: 146/567 cut-off events. [2022-11-20 10:33:25,594 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-11-20 10:33:25,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 567 events. 146/567 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3229 event pairs, 16 based on Foata normal form. 225/787 useless extension candidates. Maximal degree in co-relation 1110. Up to 168 conditions per place. [2022-11-20 10:33:25,598 INFO L137 encePairwiseOnDemand]: 111/119 looper letters, 8 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2022-11-20 10:33:25,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 264 flow [2022-11-20 10:33:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:33:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:33:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-11-20 10:33:25,600 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7282913165266106 [2022-11-20 10:33:25,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-11-20 10:33:25,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-11-20 10:33:25,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:25,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-11-20 10:33:25,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,603 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 231 flow. Second operand 3 states and 260 transitions. [2022-11-20 10:33:25,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 264 flow [2022-11-20 10:33:25,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 256 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:25,606 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 221 flow [2022-11-20 10:33:25,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2022-11-20 10:33:25,607 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, -12 predicate places. [2022-11-20 10:33:25,607 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 221 flow [2022-11-20 10:33:25,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:25,608 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:25,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:33:25,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 10:33:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1201091516, now seen corresponding path program 1 times [2022-11-20 10:33:25,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:25,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794184771] [2022-11-20 10:33:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:25,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:25,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794184771] [2022-11-20 10:33:25,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794184771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:25,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:25,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:33:25,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104067679] [2022-11-20 10:33:25,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:25,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:33:25,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:33:25,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:25,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 119 [2022-11-20 10:33:25,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:25,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 119 [2022-11-20 10:33:25,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:25,970 INFO L130 PetriNetUnfolder]: 316/963 cut-off events. [2022-11-20 10:33:25,970 INFO L131 PetriNetUnfolder]: For 667/667 co-relation queries the response was YES. [2022-11-20 10:33:25,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 963 events. 316/963 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7296 event pairs, 20 based on Foata normal form. 6/950 useless extension candidates. Maximal degree in co-relation 2753. Up to 497 conditions per place. [2022-11-20 10:33:25,978 INFO L137 encePairwiseOnDemand]: 107/119 looper letters, 61 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2022-11-20 10:33:25,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 553 flow [2022-11-20 10:33:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:33:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:33:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 491 transitions. [2022-11-20 10:33:25,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5894357743097239 [2022-11-20 10:33:25,981 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 491 transitions. [2022-11-20 10:33:25,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 491 transitions. [2022-11-20 10:33:25,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:25,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 491 transitions. [2022-11-20 10:33:25,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.14285714285714) internal successors, (491), 7 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,986 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,986 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 221 flow. Second operand 7 states and 491 transitions. [2022-11-20 10:33:25,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 553 flow [2022-11-20 10:33:25,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 532 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:25,990 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 336 flow [2022-11-20 10:33:25,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=336, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2022-11-20 10:33:25,991 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, -4 predicate places. [2022-11-20 10:33:25,992 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 336 flow [2022-11-20 10:33:25,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.166666666666664) internal successors, (373), 6 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:25,993 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:25,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:33:25,993 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 10:33:25,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:25,994 INFO L85 PathProgramCache]: Analyzing trace with hash -298955266, now seen corresponding path program 2 times [2022-11-20 10:33:25,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:25,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679307576] [2022-11-20 10:33:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:25,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:26,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679307576] [2022-11-20 10:33:26,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679307576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267001815] [2022-11-20 10:33:26,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:26,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:26,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:26,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:33:26,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:33:26,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:33:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:26,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:26,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267001815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:26,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:33:26,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-20 10:33:26,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842074426] [2022-11-20 10:33:26,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:26,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:33:26,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:33:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:33:26,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 119 [2022-11-20 10:33:26,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 336 flow. Second operand has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:26,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:26,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 119 [2022-11-20 10:33:26,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:27,935 INFO L130 PetriNetUnfolder]: 647/1843 cut-off events. [2022-11-20 10:33:27,935 INFO L131 PetriNetUnfolder]: For 1701/1701 co-relation queries the response was YES. [2022-11-20 10:33:27,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5668 conditions, 1843 events. 647/1843 cut-off events. For 1701/1701 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15442 event pairs, 14 based on Foata normal form. 10/1840 useless extension candidates. Maximal degree in co-relation 5622. Up to 505 conditions per place. [2022-11-20 10:33:27,957 INFO L137 encePairwiseOnDemand]: 103/119 looper letters, 100 selfloop transitions, 42 changer transitions 0/177 dead transitions. [2022-11-20 10:33:27,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 177 transitions, 1045 flow [2022-11-20 10:33:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:33:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:33:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 894 transitions. [2022-11-20 10:33:27,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5778926955397543 [2022-11-20 10:33:27,961 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 894 transitions. [2022-11-20 10:33:27,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 894 transitions. [2022-11-20 10:33:27,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:27,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 894 transitions. [2022-11-20 10:33:27,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 68.76923076923077) internal successors, (894), 13 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:27,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:27,972 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 119.0) internal successors, (1666), 14 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:27,972 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 336 flow. Second operand 13 states and 894 transitions. [2022-11-20 10:33:27,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 177 transitions, 1045 flow [2022-11-20 10:33:27,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 177 transitions, 1032 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:33:27,981 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 599 flow [2022-11-20 10:33:27,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=599, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2022-11-20 10:33:27,983 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2022-11-20 10:33:27,983 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 599 flow [2022-11-20 10:33:27,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:27,985 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:27,985 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:28,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:28,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:33:28,198 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 10:33:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1247337996, now seen corresponding path program 1 times [2022-11-20 10:33:28,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:28,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240807421] [2022-11-20 10:33:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:28,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:33:28,215 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:33:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:33:28,230 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:33:28,230 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:33:28,231 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 10:33:28,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 10:33:28,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-20 10:33:28,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 10:33:28,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 10:33:28,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 10:33:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:33:28,232 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-20 10:33:28,232 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:33:28,233 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 10:33:28,266 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:33:28,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 146 transitions, 356 flow [2022-11-20 10:33:28,284 INFO L130 PetriNetUnfolder]: 16/153 cut-off events. [2022-11-20 10:33:28,285 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 10:33:28,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 153 events. 16/153 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 288 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 173. Up to 10 conditions per place. [2022-11-20 10:33:28,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 146 transitions, 356 flow [2022-11-20 10:33:28,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 103 transitions, 241 flow [2022-11-20 10:33:28,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:33:28,288 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f697b2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:33:28,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 10:33:28,291 INFO L130 PetriNetUnfolder]: 3/39 cut-off events. [2022-11-20 10:33:28,291 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:33:28,292 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:28,292 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:28,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:33:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash -610787504, now seen corresponding path program 1 times [2022-11-20 10:33:28,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:28,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365616084] [2022-11-20 10:33:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:28,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:28,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:28,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365616084] [2022-11-20 10:33:28,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365616084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:28,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:28,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:28,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558975277] [2022-11-20 10:33:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:28,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:33:28,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:28,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:33:28,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:28,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 146 [2022-11-20 10:33:28,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:28,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:28,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 146 [2022-11-20 10:33:28,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:36,035 INFO L130 PetriNetUnfolder]: 50080/69789 cut-off events. [2022-11-20 10:33:36,036 INFO L131 PetriNetUnfolder]: For 20816/20816 co-relation queries the response was YES. [2022-11-20 10:33:36,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143487 conditions, 69789 events. 50080/69789 cut-off events. For 20816/20816 co-relation queries the response was YES. Maximal size of possible extension queue 2579. Compared 487579 event pairs, 15030 based on Foata normal form. 34578/102288 useless extension candidates. Maximal degree in co-relation 143453. Up to 42229 conditions per place. [2022-11-20 10:33:36,879 INFO L137 encePairwiseOnDemand]: 121/146 looper letters, 60 selfloop transitions, 15 changer transitions 0/118 dead transitions. [2022-11-20 10:33:36,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 463 flow [2022-11-20 10:33:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:33:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 10:33:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2022-11-20 10:33:36,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.663013698630137 [2022-11-20 10:33:36,884 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2022-11-20 10:33:36,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2022-11-20 10:33:36,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:36,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2022-11-20 10:33:36,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,888 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,888 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 241 flow. Second operand 5 states and 484 transitions. [2022-11-20 10:33:36,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 463 flow [2022-11-20 10:33:36,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 438 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:36,899 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 276 flow [2022-11-20 10:33:36,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2022-11-20 10:33:36,900 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -16 predicate places. [2022-11-20 10:33:36,900 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 276 flow [2022-11-20 10:33:36,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:36,901 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:36,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:33:36,902 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:33:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:36,902 INFO L85 PathProgramCache]: Analyzing trace with hash 497899920, now seen corresponding path program 1 times [2022-11-20 10:33:36,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:36,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542350427] [2022-11-20 10:33:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:36,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:36,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:36,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542350427] [2022-11-20 10:33:36,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542350427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:36,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:36,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:36,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110592758] [2022-11-20 10:33:36,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:36,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:33:36,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:36,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:33:36,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:33:36,958 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 146 [2022-11-20 10:33:36,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:36,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 146 [2022-11-20 10:33:36,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:37,156 INFO L130 PetriNetUnfolder]: 414/1413 cut-off events. [2022-11-20 10:33:37,156 INFO L131 PetriNetUnfolder]: For 504/504 co-relation queries the response was YES. [2022-11-20 10:33:37,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2913 conditions, 1413 events. 414/1413 cut-off events. For 504/504 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10102 event pairs, 50 based on Foata normal form. 765/2169 useless extension candidates. Maximal degree in co-relation 2875. Up to 460 conditions per place. [2022-11-20 10:33:37,168 INFO L137 encePairwiseOnDemand]: 136/146 looper letters, 10 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2022-11-20 10:33:37,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 318 flow [2022-11-20 10:33:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:33:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:33:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2022-11-20 10:33:37,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7077625570776256 [2022-11-20 10:33:37,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2022-11-20 10:33:37,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2022-11-20 10:33:37,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:37,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2022-11-20 10:33:37,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,173 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 276 flow. Second operand 3 states and 310 transitions. [2022-11-20 10:33:37,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 318 flow [2022-11-20 10:33:37,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 308 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:37,177 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 262 flow [2022-11-20 10:33:37,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=262, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-11-20 10:33:37,179 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -15 predicate places. [2022-11-20 10:33:37,179 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 262 flow [2022-11-20 10:33:37,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:37,179 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 10:33:37,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:33:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2145552573, now seen corresponding path program 1 times [2022-11-20 10:33:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:37,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197358659] [2022-11-20 10:33:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:37,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:37,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:37,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197358659] [2022-11-20 10:33:37,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197358659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:37,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:37,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:33:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697566618] [2022-11-20 10:33:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:37,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:33:37,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:33:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:37,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 146 [2022-11-20 10:33:37,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:37,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 146 [2022-11-20 10:33:37,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:37,786 INFO L130 PetriNetUnfolder]: 851/2282 cut-off events. [2022-11-20 10:33:37,786 INFO L131 PetriNetUnfolder]: For 1721/1721 co-relation queries the response was YES. [2022-11-20 10:33:37,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6882 conditions, 2282 events. 851/2282 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19682 event pairs, 37 based on Foata normal form. 10/2254 useless extension candidates. Maximal degree in co-relation 6842. Up to 1407 conditions per place. [2022-11-20 10:33:37,805 INFO L137 encePairwiseOnDemand]: 131/146 looper letters, 78 selfloop transitions, 22 changer transitions 0/138 dead transitions. [2022-11-20 10:33:37,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 696 flow [2022-11-20 10:33:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:33:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:33:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 574 transitions. [2022-11-20 10:33:37,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2022-11-20 10:33:37,807 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 574 transitions. [2022-11-20 10:33:37,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 574 transitions. [2022-11-20 10:33:37,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:37,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 574 transitions. [2022-11-20 10:33:37,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,813 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,813 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 262 flow. Second operand 7 states and 574 transitions. [2022-11-20 10:33:37,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 696 flow [2022-11-20 10:33:37,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:33:37,818 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 414 flow [2022-11-20 10:33:37,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2022-11-20 10:33:37,819 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -7 predicate places. [2022-11-20 10:33:37,819 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 414 flow [2022-11-20 10:33:37,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:37,820 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:37,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 10:33:37,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:33:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:37,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1408106927, now seen corresponding path program 2 times [2022-11-20 10:33:37,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:37,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134927951] [2022-11-20 10:33:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:37,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:38,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:38,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134927951] [2022-11-20 10:33:38,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134927951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:38,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108370429] [2022-11-20 10:33:38,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:38,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:38,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:38,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:38,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:33:38,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:33:38,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:33:38,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:38,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:38,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108370429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:38,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:33:38,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-20 10:33:38,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699146375] [2022-11-20 10:33:38,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:38,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:33:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:38,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:33:38,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:33:38,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-11-20 10:33:38,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 414 flow. Second operand has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:38,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:38,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-11-20 10:33:38,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:40,018 INFO L130 PetriNetUnfolder]: 1825/4623 cut-off events. [2022-11-20 10:33:40,019 INFO L131 PetriNetUnfolder]: For 4546/4546 co-relation queries the response was YES. [2022-11-20 10:33:40,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14609 conditions, 4623 events. 1825/4623 cut-off events. For 4546/4546 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 45884 event pairs, 23 based on Foata normal form. 20/4620 useless extension candidates. Maximal degree in co-relation 14562. Up to 1463 conditions per place. [2022-11-20 10:33:40,063 INFO L137 encePairwiseOnDemand]: 126/146 looper letters, 129 selfloop transitions, 55 changer transitions 0/221 dead transitions. [2022-11-20 10:33:40,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 221 transitions, 1350 flow [2022-11-20 10:33:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:33:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 10:33:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1049 transitions. [2022-11-20 10:33:40,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5526870389884089 [2022-11-20 10:33:40,068 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1049 transitions. [2022-11-20 10:33:40,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1049 transitions. [2022-11-20 10:33:40,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:40,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1049 transitions. [2022-11-20 10:33:40,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 80.6923076923077) internal successors, (1049), 13 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:40,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:40,077 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:40,077 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 414 flow. Second operand 13 states and 1049 transitions. [2022-11-20 10:33:40,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 221 transitions, 1350 flow [2022-11-20 10:33:40,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 221 transitions, 1334 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:33:40,087 INFO L231 Difference]: Finished difference. Result has 110 places, 131 transitions, 763 flow [2022-11-20 10:33:40,087 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=763, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2022-11-20 10:33:40,088 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-11-20 10:33:40,088 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 763 flow [2022-11-20 10:33:40,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 70.6086956521739) internal successors, (1624), 23 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:40,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:40,090 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:40,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:40,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:33:40,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:33:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:40,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1530628823, now seen corresponding path program 3 times [2022-11-20 10:33:40,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:40,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655718031] [2022-11-20 10:33:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:40,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:40,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655718031] [2022-11-20 10:33:40,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655718031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:40,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165594381] [2022-11-20 10:33:40,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:33:40,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:40,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:40,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:40,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:33:40,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:33:40,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:33:40,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:40,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:41,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165594381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:41,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:33:41,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2022-11-20 10:33:41,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950306294] [2022-11-20 10:33:41,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:41,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 10:33:41,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:41,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 10:33:41,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:33:41,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2022-11-20 10:33:41,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 763 flow. Second operand has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:41,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:41,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2022-11-20 10:33:41,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:33:45,668 INFO L130 PetriNetUnfolder]: 4409/11192 cut-off events. [2022-11-20 10:33:45,668 INFO L131 PetriNetUnfolder]: For 16869/16869 co-relation queries the response was YES. [2022-11-20 10:33:45,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40342 conditions, 11192 events. 4409/11192 cut-off events. For 16869/16869 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 122602 event pairs, 23 based on Foata normal form. 180/11349 useless extension candidates. Maximal degree in co-relation 40289. Up to 2321 conditions per place. [2022-11-20 10:33:45,774 INFO L137 encePairwiseOnDemand]: 124/146 looper letters, 159 selfloop transitions, 202 changer transitions 0/398 dead transitions. [2022-11-20 10:33:45,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 398 transitions, 3162 flow [2022-11-20 10:33:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 10:33:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 10:33:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2445 transitions. [2022-11-20 10:33:45,783 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5233304794520548 [2022-11-20 10:33:45,783 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2445 transitions. [2022-11-20 10:33:45,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2445 transitions. [2022-11-20 10:33:45,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:33:45,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2445 transitions. [2022-11-20 10:33:45,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 76.40625) internal successors, (2445), 32 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:45,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:45,804 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 146.0) internal successors, (4818), 33 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:45,804 INFO L175 Difference]: Start difference. First operand has 110 places, 131 transitions, 763 flow. Second operand 32 states and 2445 transitions. [2022-11-20 10:33:45,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 398 transitions, 3162 flow [2022-11-20 10:33:45,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 398 transitions, 3031 flow, removed 48 selfloop flow, removed 5 redundant places. [2022-11-20 10:33:45,865 INFO L231 Difference]: Finished difference. Result has 137 places, 256 transitions, 1978 flow [2022-11-20 10:33:45,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1978, PETRI_PLACES=137, PETRI_TRANSITIONS=256} [2022-11-20 10:33:45,866 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 34 predicate places. [2022-11-20 10:33:45,866 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 256 transitions, 1978 flow [2022-11-20 10:33:45,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 70.96153846153847) internal successors, (1845), 26 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:45,868 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:45,868 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:45,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a1ddb0-1ef9-4805-90d6-6b3cef0ec678/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:33:46,090 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:33:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1175858377, now seen corresponding path program 1 times [2022-11-20 10:33:46,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:46,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151470130] [2022-11-20 10:33:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:46,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:33:46,118 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:33:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:33:46,148 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:33:46,149 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:33:46,149 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-20 10:33:46,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-20 10:33:46,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-11-20 10:33:46,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-20 10:33:46,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-20 10:33:46,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-20 10:33:46,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-20 10:33:46,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 10:33:46,151 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-11-20 10:33:46,155 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:33:46,155 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 10:33:46,198 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:33:46,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 173 transitions, 436 flow [2022-11-20 10:33:46,224 INFO L130 PetriNetUnfolder]: 19/179 cut-off events. [2022-11-20 10:33:46,224 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 10:33:46,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 179 events. 19/179 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 345 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2022-11-20 10:33:46,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 173 transitions, 436 flow [2022-11-20 10:33:46,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 116 transitions, 280 flow [2022-11-20 10:33:46,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:33:46,234 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f697b2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:33:46,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-20 10:33:46,238 INFO L130 PetriNetUnfolder]: 3/41 cut-off events. [2022-11-20 10:33:46,238 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:33:46,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:33:46,238 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:46,239 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-11-20 10:33:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:46,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1240615746, now seen corresponding path program 1 times [2022-11-20 10:33:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:46,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817348718] [2022-11-20 10:33:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:46,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:46,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817348718] [2022-11-20 10:33:46,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817348718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:46,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:46,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:46,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420746450] [2022-11-20 10:33:46,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:46,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:33:46,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:46,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:33:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:46,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 173 [2022-11-20 10:33:46,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 116 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:46,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:33:46,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 173 [2022-11-20 10:33:46,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand